Manufacturers of add-on and modified parts planning to sell their product for use in California vehicles should apply for an exemption from Vehicle Code Section (VC) 27156. A VC 27156 exemption is granted if the product has been determined not to cause any increase in vehicular emissions. The first step to obtain a VC 27156 exemption is to submit an application to CARB. There are three types of forms available; a manufacturer must fill out the form appropriate for its product.
This application must be filled out for those add-on and modified parts for which vehicle or engine emission testing may be required to determine their impact on emissions.
For questions regarding this form, please contact CARB's Public Information Helpline at firstname.lastname@example.org or at (800) 242-4450.